FR2588129A1 - MOTOR GEARBOX FOR THE SIMULTANEOUS DRIVE OF TWO ORGANS - Google Patents

Abstract

THIS MOTOR GEARBOX HAS AN EXTENDED TUBULAR BOX 1, IN WHICH A MOTOR 2 IS FURNISHED WITH TWO COAXIAL OUTPUT SHAFTS DIRECTED IN A REVERSE DIRECTION 4 AND 6. AT THE END OF EACH OUTPUT SHAFT IS THREADED THE END 24 OF THE CRANKCASE 22 OF A REDUCER 18, 20. THE END OF THE SHAFT HAS A THREAD 8, 10 WHICH IS IN GEAR WITH A WHEEL 32 OF THE REDUCER INPUT. THE TWO REDUCERS ARE PREFERABLY SIMILAR. A CASSETTE 42, COMPRISING A LIMIT SWITCH AND ROTATION SENSORS, IS FURTHER MOUNTED IN THE CASE 1 AROUND THE OUTPUT SHAFT 6.

Description

The present invention relates to a tubular gearmotor allowing

the simultaneous training of two

  organs, which is particularly suited to the iom-

  requires displacement of either of the two

  automobile seat. Each of these movements is in fact generally controlled by two devices

  placed laterally under the seat, which must be

  placed simultaneously and in exactly the same way,

  so that the transmission between the engine and these devices

  tifs is often complex or even cumbersome. However, it is increasingly necessary to have a free place under the seat of the vehicle to increase passenger comfort.

  The object of the present invention is to provide a moto-

  reducer which allows the simultaneous training of two

  organs and is easy to set up and of an encom-

sharply reduced.

  This invention indeed relates to a motoreduc-

  tor which comprises an elongated tubular casing, delimited

  both a housing for an electric motor provided with two coaxial output shafts terminated by threads

  opposite direction or in the same direction, and a longitudi-

  nal for the passage of electrical power supply conductors

  tion, and, at each end of this housing, a reduction gear whose casing is extended by a snap-on end

in the housing.

  The gearmotor thus produced forms a space-saving unit element, having the desired length, and can easily be combined in a reduced location

  with other similar geared motors controlling

  very displacements. Its assembly is extremely simple since the reducers are placed directly at right

organs to train.

  According to another characteristic of the invention, the end piece of each reduction gear comprises a notch for receiving an internal projection of the housing and

  is threaded axially on the corresponding output shaft.

  The mounting of the reducer on the housing is thus extremely simple and allows the replacement of the reducer by another whenever it is necessary, that is to say

  ie the adaptation of the gearmotor to the ef- movements

carried out.

  According to another characteristic, the reducer com-

  carries an intermediate shaft secured to a screw wheel

  in engagement with the thread of the motor shaft, and a rear

  hollow output bre, connection to the drive member

  ner, a gear connecting the two output shafts and formed of pinions having an appropriate tooth ratio connects the intermediate shaft and the output shaft and this gear can be changed without the mounting method

  the housing or its size does not change.

  Of course the reducers placed at the two ends

  of the housing may be the same or be different

rents, depending on the uses.

  The description below of embodiments

  given by way of nonlimiting examples, and represented

  in the accompanying drawings, will also highlight the advantages

  stages and characteristics of the invention.

  In these drawings: - fig. 1 is a view in longitudinal section of a geared motor according to the invention, the motor and the shafts

  not having been shown in section for sim-

  fold the drawing; - fig. 2 is an enlarged view of a variant of the reducer of the gearmotor of FIG. 1; - fig. 3 is a view similar to FIG. 2 of another variant of the reducer;

  - fig. 4 is a partial sectional view along

  line taken in a direction substantially perpendicular

circular to that of Figure 1;

  - fig. 5 is a partial view, similar to the figure

  gure 4, from the other end of the geared motor; - fig. 6 is a sectional view along line 6-6 of FIG. 5.

  The geared motor according to the invention has a tubular form.

  laire and is enclosed inside an elongated case 1

  whose section is circular. Inside this wood

  tier is housed a motor 2, preferably an electric motor

  stick, which is provided with two coaxial output shafts, respectively 4 and 6. These shafts protrude in opposite directions on either side of the motor 2 and are each provided, at their end, with a thread 8, 10, the threads of these threads being directed in the opposite direction or in the same direction. A longitudinal partition 12 household, inside or outside the housing 1, a conduit 14 which extends over almost the entire length of the housing 1 and allows the passage of cables or other electrical conductors 16 which connect the motor 2 , outside the housing,

  to a source of electric current (not shown), via

  medium of an electrical connector 17 secured to the housing 1.

  At each end of the housing 1 is mounted a reduction gear 18, 20 which comprises a casing 22 extended by

  a tip 24 which is fitted into the housing 1.

  ference, each end piece 24 has a peripheral notch

  risk in which a circular protrusion fits

  bootmaker area 26. In addition, the end piece 24 forms a spar-

  Lement 28 which abuts against the end of this bowl-

  tier. The end piece 24 is also pierced with an axial passage allowing it to be fitted onto the output shaft

  corresponding 4 or 6 and the mounting of a bearing 30 consisting of

  killed either by a ball bearing, or simply by a bearing which supports this shaft and allows its rotation

relative to the end piece 24.

  Each of the shafts extends beyond the end piece 24 so that its thread 8 or 10 engages with a screw wheel 32 carried by an intermediate shaft 34 rotatably mounted in the casing 22. This casing also carries a shaft outlet 36 which is integral with a toothed wheel 38 engaged with a toothed wheel 40 integral with the shaft

intermediate 34.

  The ratio between the numbers of teeth on the wheels

  tees 38 and 40 is chosen so as to ensure the ratio of

desired reduction.

  The output shaft 36 is hollow and internally threaded.

  rement so as to allow its connection to the organ to be driven. Preferably, as shown in FIG. 1, the reducers 18 and 20 are similar, so that the two members driven by the motor 2 perform simultaneously

  similar movements. However these reducers for-

  should, if necessary, have reduction reports

  different, the toothed wheels 38 and 40 having diameters

  very and different numbers of teeth from those shown

  Tees in Figure 1. For example, as shown in Figures 2 and 3, these wheels can either have extremely close numbers of teeth (Fig. 2), or numbers

  different teeth but with a ratio less than this

him of figure 1 (fig. 3).

  In all cases, the reducers 18, 20 can easily be removed from the case 1 or replaced by snap-fitting of the end piece 24 on the projection 26,

  so that the most suitable reducer can at any

  be mounted on the boot 1 to ensure the drive

desired.

  Preferably, as shown, the shoemaker 1 comprises

  carries a thinner portion between the motor 2

  and one of the reducers 20, and the motor is placed in the drive

  sinage of one of the ends of this bootmaker. Therefore

  one of the output shafts 4 is short while

  the opposite shaft 6 has a relatively large length.

  This shaft 6 is then preferably made in two parts: the output shaft of the motor itself and a transmission shaft 6a which is connected to the first by means of a claw coupling or a seal

  of the gimbal type, so as to eliminate the risks of

  angular placement between these two parts of the tree.

  The gearmotor thus produced can have any

  desired length, with a diameter and consequently an encom-

  relatively weak. I1 can therefore easily be used to drive two distant organs, without requiring significant space and thanks to a simple assembly. The housing 1 can also contain, around the portion 6a of the output shaft 6, a cassette 42 formed

  by a tubular element, the practical section of which

  ment the internal shape of the housing 1, that is to say which pre-

  feels a recess 44 in line with the partition 12 of the duct 14. This cassette is threaded on the shaft 6a which

  crosses a hollow screw 46 mounted axially in the cas-

  sette and likely to rotate in relation to both

fonds 48 and 49 of this cassette.

  The screw 46 extends, moreover, to one of its

  ends, beyond the bottom 49 to be connected, by the in-

  through a reducer 50, to a solid gear 52

  of the output shaft 6a, near the thread of the latter. A player 54 is also mounted

  inside the cassette 42 and fixed on the screw 46.

  The shape of this portable player 54 combines with that of the cas-

  sette 42 to prevent rotation of the player by comparison

  screw and cassette port. However, the player

  54 is free to move axially on the screw 46.

  As shown more particularly in Figure 6, the cassette 42 has a flat face 55 which defines, with the housing 1, a narrow chamber 56 in which are, for example, mounted limit switches

  58, 60, and rotation sensors not shown.

  Thanks to this arrangement, the rotation of the shaft 6, 6a, at the same time as it causes the displacement of the member to be driven via the reduction gear 20,

  causes rotation of the screw 46, that is to say a displacement

  axial cement of the player 54. According to the direction of rotation

  of shaft 6a, the player approaches one or the other

  be sensors 58 or 60. When it reaches this sensor,

  the latter commands the engine to stop. An appropriate setting

  required from the initial position of the player 54 as well as the choice of the reduction ratio of the reduction gear 50 thus make it possible to stop the motor 2 before any brutal contact of the member to be driven with its extreme position, which limits the risks of deterioration of the whole

  and increases the longevity of the system.

  Of course, the cassette 42 could also

  contain a memory device or any other system

  analog teme facilitating the precision of the control of the

displacement.

  We thus obtain a geared motor whose function-

  can be precise and automatic although its

  tage and its realization are simple and which presents a

  particularly small footprint.

  This geared motor allows simultaneous training

  two organs performing identical movements, or even

  me different movements, and easily adapts to various devices. Indeed, the cylindrical shape of the end piece 24 as well as the transmission by screw and wheel to

  screws allow the gear unit to be given any position

  sirée around the output shaft 4, 6, i.e.

  any desired orientation to the hollow shaft 36.

Claims (6)

- CLAIMS -   1 - Geared motor for the simultaneous drive of two bodies, characterized in that it comprises an elongated tubular housing (1) which delimits a housing for a   electric motor (2) with two output shafts   xials (4, 6) terminated by threads (8, 10), as well as a longitudinal passage duct (14)   electrical supply conductors, and, at each ex-   end of the housing, a reduction gear (18, 20) including the casing   (22) is extended by a cylindrical end piece - (24) in the housing.   2 - Geared motor according to claim 1, charac-   terized in that the cylindrical end piece (24) of the reducer   has a peripheral notch for receiving a sail-   internal link (26) of the housing, and a central passage through   poured from the motor output shaft (4, 6).   3 - Geared motor according to one of claims   1 and 2, characterized in that the reduction gear (18, 20) comprises   carries a screw wheel (32) in engagement with the corresponding thread (8,10), and a hollow drive shaft (36) of   connection to the organ to be driven.   4 - Geared motor according to one of claims   previous, characterized in that the motor (2) is placed   near one end of the case and causes an ar-   very long exit bre (6) made in two parts   ties linked together by a claw coupling.   - Geared motor according to one of claims   previous, characterized in that it comprises internally   laughing case, around one of the output shafts, a cassette (42) carrying limit switches (58,60) and rotation sensors and a walkman (54) driven from the shaft corresponding output.   6 - Geared motor according to claim 5, charac-   terized in that the cassette (42) carries a hollow screw   linked to the output shaft (6) via a re-   conductor (50), on which the player (54) moves axially.   7 - Geared motor according to one of claims   and 6, characterized in that the cassette (42) has a planar face (55) which delimits with the case (1) a   chamber (56 overpassing the electrical circuit of the cap-   tor and their connection to the engine.